Tweco 6000 CE Merlin - Manual (Page 28)

INSTALLATION PROCEDURES 3-10 Manual 0-2601
D. Plasma and Secondary Gases With
Optional Gas Control
The required plasma and secondary gases are connected
to the rear of the Power Supply. The secondary selection
switch on the front panel of the Power Supply must al-
ways be set to GAS for all secondary gases when the Gas
Control Option is installed. The type of gas to be used
will be selected at the Gas Control Option front panel.
NOTE
If compressor shop air is to be used as the plasma
gas the line must be filtered.
If using shop air as one of the plasma gases then install
the optional Two Stage Air Line Filter as follows:
NOTE
Use these instructions only for Power Supplies
that HAVE the Gas Control Option installed.
1. Remove the air supply input hose from the Plasma Gas (Air)
Input Fitting at the rear of the power supply, if already in-
stalled.
2. Locate the two mounting studs on the rear of the unit and
secure the Air Filter Mounting Bracket to the panel using
the two 10-32 Nylon Locking Nuts provided.
Air Filter
Mounting Bracket
Mounting
Nuts
Mounting
Studs
A-01336
Figure 3-13 Air Filter Mounting Bracket Installation
3. Place thread sealer on the threads of the 1/4 NPT Street
Elbow (see NOTE).
NOTE
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
4. Install the supplied 1/4 NPT Street Elbow into the input port
(IN) of the Air Line Filter Assembly.
5. Slide the Air Line Filter Assembly into the mounting bracket.
The Filter Assembly will snap into place.
A-01339
1/4 NPT
Elbow
Air Filter
Assembly
Air Filter
Mounting
Bracket
OUTPUT TO CONTROL CONTROL
MODULE
AIR PLASMA PLASMA
INPUT
N2 PLASMA PLASMA
INPUT
O2 PLASMA PLASMA
INPUT
PLASMA GAS PLASMA GAS
Ar/H Ar/H 2 PLASMA PLASMA
INPUT
Hose
Assembly
Filter to
Plasma
Gas Input
Gas Control
Plasma Gas
Input Fitting
Figure 3-14 Supply Hose Connections With Gas Control
Option
6. Place thread sealer on the threads of the connectors at both
ends of the Filter to Plasma Input Gas Hose Assembly (see
NOTE).
NOTE
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
7. Connect the Filter to Plasma Input Gas Hose Assem-
bly to the output port (OUT) of the Air Line Filter
Assembly and to the Air Plasma Input Fitting on the
Gas Control Manifold.
8. Place thread sealer on the threads of the Street Elbow
on a Y-Hose Assembly (see NOTES).
NOTES
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
The Y-Hose Assembly is customer supplied and is
shown to illustrate one method of connecting the
customer's air supply.
9. Connect the air supply hose from a Y-Hose Assembly
to the street elbow on the Air Line Filter input port
(IN). The Y-Hose Assembly should have already been
installed, if shop air was being used as the plasma
and secondary gases.